内燃机工程2025，Vol.46Issue(2)：27-35,9.DOI:10.13949/j.cnki.nrjgc.2025.02.004
多种工况下醇类燃料喷雾特性试验研究
Experimental Study on the Spray Characteristics of Alcohol Fuels Under Various Working Conditions
摘要
Abstract
The spray characteristics of methanol,ethanol,and n-butanol under different working conditions were investigated by the shadow method using a fixed volume spray test setup with injection pressure ranging from 10 to 30 MPa,backpressure ranging from 0.1 to 0.7 MPa,and ambient temperature ranging from 20 to 120℃.The effects of different working conditions on the spray characteristics of the alcoholic fuels were analyzed by image processing with MATLAB software.The results show that the spray penetration distance and spray area of the three fuels are obviously affected by the injection pressure and back pressure,and the spray cone angle has a close relationship with the environmental conditions.The increase of injection pressure and ambient temperature will accelerate the splitting and evaporation of droplets,which plays an important role in improving the atomization quality and spray characteristics.Under the same working conditions,the characteristics of the fuel itself cause the difference in spray form,the dynamic viscosity and surface tension of n-butanol are larger,and the spray development is slower in the low temperature environment,but the droplet evaporation and crushing degree are smaller in the high temperature and high pressure environment,and the spray form and development speed can be maintained.关键词
甲醇/乙醇/正丁醇/直喷/喷雾特性Key words
methanol/ethanol/n-butanol/direct injection/spray characteristic分类
能源与动力引用本文复制引用
杨涵惠,甄旭东,刘大明,耿杰,鄢仁彬,田智..多种工况下醇类燃料喷雾特性试验研究[J].内燃机工程,2025,46(2):27-35,9.基金项目
国家自然科学基金项目(51406135) National Natural Science Foundation of China(51406135) （51406135）
